<f:view contentType="application/json"
        xmlns:f="http://java.sun.com/jsf/core"
        xmlns:util="http://code.google.com/p/ada-asf/util"
        xmlns:h="http://java.sun.com/jsf/html">
[
 { "action": "update", "id": "#result", "data": "<util:escape>
     <h:panelGroup rendered="#{not empty compute.volume}">
         <h2>The cylinder volume is
             <h:outputText value="#{compute.volume}">
                <f:converter converterId="float"/>
             </h:outputText>
         </h2>
     </h:panelGroup>
    </util:escape>" }
]
</f:view>